QR Code support, with auto generate it from string

README.md

@@ -58,7 +58,10 @@
   - Create a folder called "files" in your www folder and paste init.lua, modules, data, and exe files
   - Uncomment and change this line (https://github.com/mehah/otclient/blob/main/init.lua#L6)
 - Colored text [@conde2](https://github.com/conde2)
-  - ex: widget:setColoredText("{Colored text, #ff00ff} normal text")
+  - widget:setColoredText("{Colored text, #ff00ff} normal text")
+- QR Code support, with auto generate it from string  [@conde2]
+  - qr-code-border: 2
+  - qr-code: Hail OTClient Redemption - Conde2 Dev
 
 ##### [OTClient V8](https://github.com/OTCv8) (Features)
 - Lighting System

src/CMakeLists.txt

@@ -360,6 +360,7 @@ set(SOURCE_FILES
 	framework/stdext/string.cpp
 	framework/stdext/time.cpp
 	framework/stdext/uri.cpp
+	framework/stdext/qrcodegen.cpp
 	framework/ui/uianchorlayout.cpp
 	framework/ui/uiboxlayout.cpp
 	framework/ui/uigridlayout.cpp

src/framework/graphics/image.cpp

@@ -27,6 +27,9 @@
 #include <framework/graphics/apngloader.h>
 
 #include "framework/stdext/math.h"
+#include "framework/stdext/qrcodegen.h"
+
+using namespace qrcodegen;
 
 Image::Image(const Size& size, int bpp, uint8_t* pixels) : m_size(size), m_bpp(bpp)
 {
@@ -242,4 +245,27 @@ void Image::reverseChannels()
     for (uint8_t* itr = pixelData; itr < pixelData + m_pixels.size(); itr += m_bpp) {
         std::swap(*(itr + 0), *(itr + 2));
     }
-}
+}
+
+ImagePtr Image::fromQRCode(const std::string& code, int border)
+{
+    try
+    {
+        QrCode qrCode = QrCode::encodeText(code.c_str(), QrCode::Ecc::MEDIUM);
+
+        const auto size = qrCode.getSize();
+        ImagePtr image(new Image(Size(size + border * 2, size + border * 2)));
+
+        for (int x = 0; x < size + border * 2; ++x) {
+            for (int y = 0; y < size + border * 2; ++y) {
+                image->setPixel(x, y, qrCode.getModule(x - border, y - border) ? Color::black : Color::white);
+            }
+        }
+
+        return image;
+    } catch (const std::exception& e) {
+        g_logger.error(stdext::format("Failed to encode qr-code: '%s': %s", code, e.what()));
+    }
+
+    return {};
+}

src/framework/graphics/image.h

@@ -31,6 +31,7 @@ class Image
 
     static ImagePtr load(const std::string& file);
     static ImagePtr loadPNG(const std::string& file);
+    static ImagePtr fromQRCode(const std::string& code, int border);
 
     void savePNG(const std::string& fileName);
 

src/framework/luafunctions.cpp

@@ -676,6 +676,7 @@ void Application::registerLuaFunctions()
     g_lua.bindClassMemberFunction<UIWidget>("getFont", &UIWidget::getFont);
     g_lua.bindClassMemberFunction<UIWidget>("getTextSize", &UIWidget::getTextSize);
     g_lua.bindClassMemberFunction<UIWidget>("hasShader", &UIWidget::hasShader);
+    g_lua.bindClassMemberFunction<UIWidget>("setQRCode", &UIWidget::setQRCode);
 
     // UILayout
     g_lua.registerClass<UILayout>();